Clarke Metalworker CBG6250L Instruction Manual

OPERATION & MAINTENANCE
INSTRUCTIONS
LS0811
BENCH GRINDER WITH LIGHT AND
WHEEL DRESSER
MODEL NO: CBG6250L
PART NO: 6500524

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INTRODUCTION
Thank you for purchasing this CLARKE Bench Grinder with light and wheel
dresser.
Before attempting to use this product, please read this manual thoroughly and
follow the instructions carefully. In doing so you will ensure the safety of yourself
and that of others around you, and you can look forward to your purchase
giving you long and satisfactory service.
GUARANTEE
This product is guaranteed against faulty manufacture for a period of 12
months from the date of purchase. Please keep your receipt which will be
required as proof of purchase.
This guarantee is invalid if the product is found to have been abused or
tampered with in any way, or not used for the purpose for which it was
intended.
Faulty goods should be returned to their place of purchase, no product can
be returned to us without prior permission.
This guarantee does not effect your statutory rights.
SPECIFICATIONS
Model Number CBG6250L
Part Number 6500524
Rated Voltage 230V~50Hz
Rated Input 250 W
No Load Speed 2850 RPM (+/- 5%)
Sound Pressure Level LpA 87 db
Sound Power Level LWA 97 db
Uncertainty Factor K 3
Weight 9.8 kg
Abrasive wheels supplied Coarse (36 Grit), Fine (60 Grit)
Wheel dimensions Diameter (150mm) Thickness (20 mm) Bore (12.7 mm)

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POWER TOOL SAFETY WARNINGS
1) WORK AREA
1. Keep the work area clean and well lit. Cluttered and dark areas invite accidents.
2. Do not operate power tools in explosive atmospheres, such as in the presence of
flammable liquids, gases or dust. Power tools create sparks which may ignite the
dust or fumes.
3. Keep children and bystanders away while operating a power tool. Distractions can
cause you to lose control.
2) ELECTRICAL SAFETY
1. Power tool plugs must match the outlet. Never modify the plug in any way. Do not
use adapter plugs with earthed (grounded) power tools. Unmodified plugs and
matching outlets will reduce the risk of electric shock.
2. Do not expose power tools to rain or wet conditions. Water entering a power tool will
increase the risk of electric shock.
3. Do not abuse the cable. Never use it for carrying, pulling or unplugging the power
tool. Keep the cable away from heat, oil, sharp edges or moving parts. Damaged or
entangled cables increase the risk of electric shock.
4. When operating a power tool outdoors, use an extension cable suitable for outdoor
use. Use of a cable suitable for outdoor use reduces the risk of electric shock
5. If operating the power tool in a damp location is unavoidable, use a residual current
device (RCD) protected supply.
3) PERSONAL SAFETY
1. Stay alert, watch what you are doing and use common sense when operating a
power tool. Do not use a power tool while you are tired or under the influence of
drugs, alcohol or medication. A moment of inattention while operating power tools
may result in personal injury.
2. Use safety equipment. Always wear eye protection. Safety equipment such as dust
mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate
conditions will reduce personal injuries.
3. Avoid accidental starting. Ensure the switch is in the off position before plugging in.
Carrying power tools with your finger on the switch or plugging in power tools that
have the switch on invites accidents.
4. Remove any wrench before turning the power tool on. A wrench left attached to a
rotating part may result in personal injury.
5. Do not overreach. Keep proper footing and balance at all times. This enables better
control of the power tool in unexpected situations.
6. Dress properly. Do not wear loose clothing or jewellery. Keep your hair, clothing and
gloves away from moving parts. Loose clothes, jewellery or long hair can be caught
in moving parts.

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4) POWER TOOL USE AND CARE
1. Do not force the power tool. Use the correct accessories for your application. The
correct power tool will do the job better and safer at the rate which it was designed.
2. Do not use the power tool if the switch does not turn it on and off. Any power tool that
cannot be controlled with the switch is dangerous and must be repaired.
3. Disconnect the plug from the power source before changing accessories, or storing
power tools. Such preventive safety measures reduce the risk of starting the power
tool accidentally.
4. Store idle tools out of the reach of children and do not allow persons unfamiliar with
the power tool or these instructions to operate it. Power tools are dangerous in the
hands of untrained users.
5. Maintain power tools. Check for misalignment or binding of moving parts, breakage
of parts and any other condition that may affect the power tool’s operation. If
damaged, have the power tool repaired before use. Many accidents are caused
by poorly maintained power tools.
6. Use the power tool and accessories in accordance with these instructions and in the
manner intended, taking into account the working conditions and the work to be
performed. Use of the power tool for operations different from intended could result
in a hazardous situation.
7. The performance of this tool may vary, depending upon variations in line voltage.
Extension cable usage may also affect performance.
5) SERVICE
1. Have your power tool serviced by qualified service personnel using only identical
replacement parts. This will ensure that the safety of the power tool is maintained.
BENCH GRINDER SAFETY WARNINGS
1. Hold the hand tool or blade being sharpened firmly to prevent loss of control.
2. NEVER install a abrasive flap wheel or sanding disc on this grinder.
3. Always replace a cracked grinding wheel immediately.
4. Never use damaged or incorrect grindstones. The stone and retaining bolt were
specially designed for your grinder, for optimum performance and safety of
operation. Inspect the condition of the grinding stone before use and do not use if
any damage is noticed.
5. Do not use aluminium oxide wheels when grinding non-ferrous metals such as
aluminium or brass. Use silicon carbide wheels (not included) for grinding non-ferrous
metals.
6. Always use the tool rests to steady the workpiece. If the tool attachments are not
used, the torque of the spinning grinding/polishing wheel may pull the workpiece
from your hands.
7. Never leave the grinder unattended when it is connected to an electrical power
supply. Switch off the machine and unplug it before leaving.

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8. ALWAYS check for damaged parts. Before further use of the tool, a guard or other
part that is damaged should be carefully checked to determine if it would operate
properly and perform its intended function. Check for misalignment or binding of
moving parts, breakage of parts and any other condition that may affect the tool's
operation. A part that is damaged should be properly repaired or replaced at an
authorised service Centre. Following this rule will reduce the risk of electric shock, fire
or serious injury.
9. Gloves, manufactured to the current European safety standards should be worn
when operating grinding equipment.
10. Eye protection manufactured to the current European safety standards should be
worn when operating grinding equipment.
Note: Bench grinders used in industrial environments may be subject to the
requirements of The Provision and Use of Work Equipment regulations 1992
(particularly regarding the training requirement of The Abrasive Wheels
Regulations 1970), or other legislation. If in doubt seek advice.
Please keep these instructions in a safe place for future reference.
SAFETY SYMBOLS
Read Instruction Manual Before Use
This Machine Is Not Suitible For Hand Held Use
Not Suitible For Hand Held Use
Wear Eye Protection
Wear Ear Defenders
Wear Protective Gloves

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ELECTRICAL CONNECTIONS
Before switching the product on, make sure that the voltage of your electricity supply is
the same as that indicated on the rating plate. This product is designed to operate on
230VAC 50Hz. Connecting it to any other power source may cause damage.
This product may be fitted with a non-rewireable plug. If it is necessary to change the
fuse in the plug, the fuse cover must be refitted. If the fuse cover becomes lost or
damaged, the plug must not be used until a suitable replacement is obtained.
If the plug has to be changed because it is not suitable for your socket, or due to
damage, it should be cut off and a replacement fitted, following the wiring instructions
shown below. The old plug must be disposed of safely, as insertion into a mains socket
could cause an electrical hazard.
If the colours of the wires in the power cable of this product do not correspond with the
markings on the terminals of your plug, proceed as follows.
• The wire which is coloured Blue must be connected to the terminal which is
marked Nor coloured Black.
• The wire which is coloured Brown must be connected to the terminal which is
marked Lor coloured Red.
• The wire which is coloured Yellow and Green must be connected to the
terminal which is marked E or or coloured Green.
We strongly recommend that this machine is connected to the mains supply via a Residual
Current Device (RCD)
If in any doubt, consult a qualified electrician. DO NOT attempt any repairs yourself.
WARNING! Read these electrical safety instructions thoroughly
before connecting the product to the mains supply.
WARNING! The wires in the power cable of this product are
coloured in accordance with the following code:
Blue = Neutral Brown = Live Yellow and Green = Earth
Plug must be BS1363/A approved.
Always fit a 5 Amp fuse.
Ensure that the outer sheath of the cable is firmly held by the clamp
Neutral
(Blue)
Live
(Brown)
Earth
(Green and Yellow)

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CARTON CONTENTS
The following items should be supplied in the carton. If any parts are missing or
damaged, please contact the Clarke dealer where you purchased the
bench grinder.
PART IDENTIFICATION
1 x Bench Grinder Assembly (2 grinding wheels attached)
2 x Eye Shields (1 with Built-in Magnifying Lens)
2 x Eye Shield Arms with bolts and washers
2 x Eye Shield Brackets
2 x Hand Knobs with washers
2 x Spark Deflectors with bolts and washers
2 x Tool Rests with screws and washers (1 flat and 1 with a channel for sharpening drill bits)
1 x Wheel Dresser

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BEFORE USE
MOUNTING THE GRINDER ON A WORKBENCH
NOTE: We highly recommend that you bolt this bench grinder securely to a
workbench to gain maximum stability for your machine.
1. Using the base of the bench
grinder as a template, mark the
bench through the holes in the
casting.
2. Bolt the bench grinder to the
bench with bolts, washers and nuts
(not supplied).
3. To reduce vibration, mount the
bench grinder on a vibration
absorbing mat.
INSTALLING THE TOOL RESTS
1. Fix the tool rests to the bench
grinder with the screw and hand
knob as shown.
• The tool rests are adjustable
and should be positioned 1.5
mm from the grinding wheels.
• Ensure that the tool rest is firmly
fixed and horizontal.
• One of the tool rest has a
angled grove to allow you to sharpen the ends of drill bits.
INSTALLING THE SPARK DEFLECTORS
Fit both the spark deflectors to the
wheel guards using the screws
provided.
• Adjust the spark deflector
frequently to compensate for
wear of the wheel, keep the
distance between the spark
deflector and wheel as small as
possible and never more than
2mm.

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INSTALLING THE EYE SHIELDS
1. Attach the left eye shield arm to
the bench grinder using the
bracket, flat washer and bolt
supplied.
2. Fit the lens to the lens holder as
shown.
3. Repeat for right side eye shield.
NOTE: Adjust the eye shields to an
appropriate distance from the
tool rests avoiding
interference during operation.
SHARPENING TIPS
SCISSORS
If possible, take the scissors apart to make the sharpening operation easier
and safer. Remove material only from the outside surface and work from the
handle end of the blade toward the tip.
KNIVES
Remove metal equally from both faces, working from the handle end of the
blade toward the tip.

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OPERATION
NOTE: Check that there is a 1.5 mm clearance between the tool rests and the
surface of the grinding wheel. Adjust as necessary. Re-check the gap
between the spark deflectors and the surface of the grinding wheels.
These should also be a maximum of 2 mm. Adjust as necessary.
NOTE: Check that the eyeshields have been secured in the correct position
and that the grinding wheel lock nuts are tight.
1. Stand to the side of the bench grinder and switch it on using the on/off
switch.
• Let the grinding wheel reach full speed before grinding.
• The wheel rotates in the same direction as the arrow stamped in the
side of the wheel guard.
2. Hold the work piece firmly against the tool rest. Hold very small pieces with
pliers or other suitable clamps.
3. Feed the work piece smoothly and evenly against the grinding wheel.
4. When grinding, always keep the work piece moving across the face of the
wheel. Grinding against the same part of the wheel will cause uneven
wear of the wheel face.
5. Grind only on the face of the grinding wheel and never the side of it.
(Some wheels are designed for side grinding and will say so on their
packaging.)
NOTE: Prolonged grinding will cause most tools to become hot. Use care
when handling hot tools.
6. Switch the bench grinder off using the on/off switch when you have
finished.
USING THE BUILT IN LIGHT
The built in light will come on automatically whenever the bench grinder is
switched on.
The arm can bend to set the light in a suitable position.
CAUTION: KEEP ALL BYSTANDERS A SAFE DISTANCE AWAY FROM THE
TOOL AND NOT IN DIRECT LINE, FRONT OR BACK OF THE GRINDER.
CAUTION: ALWAYS WEAR SAFETY GLASSES

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MAINTENANCE
Keep the machine clean by wiping off dust with a clean cloth, and
occasionally blowing the grinder through with compressed air. Always wear
protective goggles when blowing through with compressed air.
The grinding wheel may need trueing or dressing occasionally. Only dress the
wheel with a proper dressing tool, whilst wearing safety goggles or glasses. If in
doubt seek expert advice.
DRESSING THE WHEEL
When the abrasive wheels start to become clogged with debris, use the
dresser tool supplied to clean (dress) them.
1. Start the bench grinder running
2. Place the dresser tool on the tool rest with the dresser wheels facing the
abrasive wheel.
3. Slide the dresser tool forward until contact is made with the abrasive wheel
and maintain a light pressure to clean the debris from the abraisive wheel.
4. After dressing, adjust the tool rests and spark deflectors as necessary.
CHANGING THE LIGHT BULB
Remove the bulb by twisting it anticlockwise.
Replace with an identical bulb (12V, 10W, ES10 fitting) available from the
Clarke Parts Department.
WARNING: DISCONNECT THE GRINDER FROM THE MAINS SUPPLY BEFORE
FITTING REPLACEMENT WHEELS, CLEANING OR ADJUSTMENT.

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REPLACING THE GRINDING WHEELS
Do not use damaged grinding wheels.
Switch the grinder off and disconnect the power supply.
1. Loosen the screws shown and
rotate and remove the cover.
2. Hold the other wheel by hand, and
remove the nut and outer flange.
3. Slide off the old grinding wheel.
• Use only grinding wheels
recommended by the
manufacturer which have a
marked speed equal to or
greater than the speed marked
on the nameplate of the tool and have maximum dimensions of
150 mm diameter, 20 mm thick with a bore size of 12.7 mm.
• Inspect the wheel for cracks, chips or any other visible damage,
damaged abrasive products must be destroyed and discarded
NOTE: The left hand grinding wheel locking nut has a left handed thread.
4. Replace the outer flange.
• Make sure both wheel flanges
are placed with the concave
sides towards the wheel.
5. Replace the nut securely.
• Do not overtighten as this may
damage the grinding wheel.
6. Re-assemble the guards fully prior
to carrying out testing.
• Each time after mounting, the wheel should be test run for a
reasonable time (approximately 1 minute).

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PARTS DIAGRAM

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PARTS LIST
1 Phillips Screw Assembly WACBG6250L01
2 Left Guard Cover WACBG6250L02
3 I type Hex Nut WACBG6250L03
4 Wheel Flange WACBG6250L04
5 Wheel(36#) WACBG6250L05
6 Phillips Screw WACBG6250L06
7 Left Guard WACBG6250L07
8 Left Spark Deflector WACBG6250L08
9 Flat Washer WACBG6250L09
10 Phillips Screw WACBG6250L10
11 L/H Eyeshield mount rod WACBG6250L11
12 Bracket WACBG6250L12
13 Flat Washer WACBG6250L13
14 Hex Bolt WACBG6250L14
15 Dome Screw WACBG6250L15
16 Eyeshield Plate WACBG6250L16
17 Big Flat Washer WACBG6250L17
18 Phillips Screw WACBG6250L18
19 Phillips Screw WACBG6250L19
20 R/H Eyeshield mount rod WACBG6250L20
21 End cap WACBG6250L21
22 I type Hex Nut WACBG6250L22
23 Wavy washer WACBG6250L23
24 Ball bearing WACBG6250L24
25 Stator WACBG6250L25
26 Rotor WACBG6250L26
27 Nut WACBG6250L27
28 Lock Nut WACBG6250L28
29 L/H work rest WACBG6250L29
30 Eyeshield WACBG6250L30
31 Work Rest Lock knob WACBG6250L31
32 Standard Washer WACBG6250L32
33 Flat Washer WACBG6250L33
34 I type Hex Nut WACBG6250L34
35 Nut WACBG6250L35
36 Wheel(60#) WACBG6250L36
37 Locked Nut WACBG6250L37
38 Toothed Locking Washer WACBG6250L38
39 Phillips Screw WACBG6250L39
40 Right Guard WACBG6250L40
41 Cable Grommet WACBG6250L41
42 Capacitor WACBG6250L42
43 Capacitor holder WACBG6250L43
44 Washer WACBG6250L44
45 Dressing Wheel WACBG6250L45
46 Lamp Assembly WACBG6250L46
47 Motor housing WACBG6250L47
48 Cord & Plug WACBG6250L48
49 Strain relief WACBG6250L49
50 Nut WACBG6250L50
51 Toothed Locking Washer WACBG6250L51
52 Switch Plate WACBG6250L52
53 Switch WACBG6250L53
54 Hex nut WACBG6250L54
55 Phillips Screw WACBG6250L55
56 Flat washer WACBG6250L56
57 Rubber foot WACBG6250L57
58 Tool tray WACBG6250L58
59 Base Plate WACBG6250L59
60 R/H work rest WACBG6250L60
61 Flat washer WACBG6250L61
62 Bulb WACBG6250L62
63 Magnified eye shield WACBG6250L63
64 Dressing tool base WACBG6250L64
65 Flat washer WACBG6250L65
66 Standard Washer WACBG6250L66
67 Phillips Screw WACBG6250L67
68 Right Guard Cover WACBG6250L68
69 Right Spark Deflector WACBG6250L69

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DECLARATION OF CONFORMITY